netdev - Re: [RFC] arp announce, arp_proxy and windows ip conflict verification

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Message-Id: <200907030213.42203.denys@visp.net.lb>
Date:	Fri, 3 Jul 2009 02:13:42 +0300
From:	Denys Fedoryschenko <denys@...p.net.lb>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>
Subject: Re: [RFC] arp announce, arp_proxy and windows ip conflict verification

On Friday 03 July 2009 01:18:33 Eric W. Biederman wrote:

and few more details

if i set 
"ip local-proxy-arp" on Fa 1/0

it still respects ARP Announce (as mypatch was doing, but mistake in patch it 
was not updating ARP cache)

home ~ # tcpdump -ni tap0 -vvv -s 1500
tcpdump: listening on tap0, link-type EN10MB (Ethernet), capture size 1500 
bytes
02:11:15.520588 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.8 
(ff:ff:ff:ff:ff:ff) tell 10.0.1.3, length 28
02:11:15.523696 ARP, Ethernet (len 6), IPv4 (len 4), Reply 10.0.1.8 is-at 
ca:00:0a:fc:00:1c, length 46
02:11:16.520616 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.8 
(ca:00:0a:fc:00:1c) tell 10.0.1.3, length 28
02:11:16.523365 ARP, Ethernet (len 6), IPv4 (len 4), Reply 10.0.1.8 is-at 
ca:00:0a:fc:00:1c, length 46
02:11:17.520635 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.8 
(ca:00:0a:fc:00:1c) tell 10.0.1.3, length 28
02:11:17.525146 ARP, Ethernet (len 6), IPv4 (len 4), Reply 10.0.1.8 is-at 
ca:00:0a:fc:00:1c, length 46
02:11:18.648310 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.3 
(ff:ff:ff:ff:ff:ff) tell 10.0.1.3, length 28
02:11:19.648364 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.3 
(ff:ff:ff:ff:ff:ff) tell 10.0.1.3, length 28
02:11:20.648421 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.1.3 
(ff:ff:ff:ff:ff:ff) tell 10.0.1.3, length 28

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